// 自定义tabba --> rindex.wxml

<cover-view class="tab-bar" wx:if="{{showTabBar}}">
  <cover-view class="tab-bar-border"></cover-view>
  <cover-view 
    wx:for="{{isClientVersion?clientList:shopList}}" 
    wx:key="index" 
    class="tab-bar-item" 
    data-path="{{item.pagePath}}" 
    data-selectedPath="{{item.selectedIconPath}}" 
    data-index="{{index}}" 
    bindtap="switchTab"
  >
    <cover-image 
      class="cover-image" 
      src="{{selected === index ? item.selectedIconPath : item.iconPath}}">
    </cover-image>
    <cover-view 
      class="cover-view" 
      style="color: {{selected === index ? selectedColor : color}}">
      {{item.text}}
    </cover-view>
  </cover-view>
</cover-view>
// index.js
var app =  getApp();
Component({
  data: {
    showTabBar:true,
    selected: 0,
    color: "#7A7E83",
    selectedColor: "#3cc51f",
    isClientVersion:app.globalData.isClientVersion,
    clientList: [{
      pagePath: "/pages/index/index",
      iconPath: "/assets/tabBar/order-nor@2x.png",
      selectedIconPath: "/assets/tabBar/order-press@2x.png",
      text: "预约"
    },
    {
      pagePath: "/pages/message/message",
      iconPath: "/assets/tabBar/my-nor@2x.png",
      selectedIconPath: "/assets/tabBar/my-press@2x.png",
      text: "我的"
    }],
    shopList: [{
      pagePath: "/pages/managementServiceList/managementServiceList",
      iconPath: "/assets/tabBar/my-nor@2x.png",
      selectedIconPath: "/assets/tabBar/my-press@2x.png",
      text: "服务列表"
    },
    {
      pagePath: "/pages/message/message",
      iconPath: "/assets/tabBar/my-nor@2x.png",
      selectedIconPath: "/assets/tabBar/my-press@2x.png",
      text: "我的"
    }],
    realList:[]
  },
  // 组件生命周期
  lifetimes:{
    attached(){
      this.setData({
        isClientVersion:app.globalData.isClientVersion,
      })
    }
  },
  methods: {
    switchTab(e) {
      const data = e.currentTarget.dataset
      const url = data.path
      wx.switchTab({url})
    }
  }
})
// ‘我的’相关代码
onShow（）{
   if (typeof this.getTabBar === 'function' && this.getTabBar()) {
      this.getTabBar().setData({
        selected: 1    // 根据tab的索引值设置
      })
  }
// ‘预约页面’相关代码
onShow（）{
   if (typeof this.getTabBar === 'function' && this.getTabBar()) {
      this.getTabBar().setData({
        selected: 0   // 根据tab的索引值设置
      })
  }
// ‘服务列表’相关代码
onShow（）{
   if (typeof this.getTabBar === 'function' && this.getTabBar()) {
      this.getTabBar().setData({
        selected: 0    // 根据tab的索引值设置
      })
  }
    

onTabItemTap 点击 tab 时触发，更新数据就好

代码的问题吧 贴下代码看看